PAWFLY Submersible Heater, EUH-300, Rated 300W. Doesnt work, goes to E2

PAWFLY Submersible Heater, EUH-300, Rated 300W. Doesnt work, goes to E2I found it at the liquidation store. It looks new and clean, but doesnt all workAfter power up, it shows the temperature and the target temp can be set, but then it goes to E2.I didnt try to investigate the insides. Might be good for somebody who wants to tinker or use for parts. It has a 300 Watt heater inside the tube ( always keep it submerged) And has some sort of control block inside that can measure the temp and adjust the heat (when it works).More than $20 new. superb for everyday use. finest materials and excellent craftsmanship ensure long-lasting durability.